package/qt5/qt5xmlpatterns: enable qml module

qt5declarative:
 - remove unneded dependency on qt5mlpatterns

qt5xmlpatterns:
 - add optional dependency on qt5declarative

Reported-by: Nimai Mahajan <nimaim@gmail.com>
Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>